Thanks for the feedback.
I generally play +2/8 or +3/5 or 6, depending on the enemies. I spend a lot of time in melee due to the aoes that my toon has so that's why I went for high s/l and e/n rather than ranged...but AOE can be an issue. Even though my endurance use is 1.67 it hasn't been issue due to the procs I use (numina's, miracle, panacea, 2 +end performance shifters}. I like my characters damage ouput.
I see your concerns and they are valid. Is it possible to see your build, Nightmare Shaman?